Indications of defective hardware components, but no diagnostic software is accurate every single time. The last lesson introduced you to a variety of Apple and third-party diagnostic tools. How Does Component Isolation Work With Diagnostics? Of the system and the steps of the procedure for that system. When other approaches have not worked, and you need to make sure that the system hardware is working correctlyĬomponent isolation requires an ESD-compliant work area, appropriate tools for taking apart the product you are testing, and job aids identifying components.When you are attempting to isolate intermittent, hard-to-find hardware issues.Isolation works in a much more systematic manner. You should not confuse this procedure with randomly swapping modules until a system finally works. Of the normal power flow sequence (discussed later in this lesson), the symptoms you observe may direct you to add or replaceĬomponents in a specific sequence until you can determine the hardware component that is causing the issue. Here's how it works: Using a minimal system, you start up a computer and observe its behavior. Which you can accurately and decisively determine the source of hardware issues. This procedure is called component isolation-a technique with That can aid you in identifying faulty hardware components.
You should also be prepared to systematically address a troubleshooting issue. With that knowledge under your belt, you should be at a stage where you can tell whether you're seeing a software issue orĪ hardware issue. In addition, earlier in this lesson we reviewed the general principles of troubleshooting that Apple advocates. In Lesson 2, you learned about diagnostic tools and references that can assist you in determining whether an issue is caused by hardware One of the major difficulties in troubleshooting computer systems is pinpointing the specific cause of a hardware issue. Apple Training Series: Desktop and Portable Systems, 2nd Edition
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